Which of the Following Statements About Thermal Electrocyclic Reactions Is

question 14

Multiple Choice

Which of the following statements about thermal electrocyclic reactions is not true?

• A) The number of  bonds in the conjugated polyene determines whether rotation is conrotatory or disrotatory.
• B) Thermal electrocyclic reactions occur in a disrotatory fashion for a conjugated polyene with an odd number of  bonds.
• C) Thermal electrocyclic reactions occur in a conrotatory fashion for a conjugated polyene with an even number of  bonds.
• D) In thermal reactions, we consider the orbitals of the HOMO of the ground state electronic configuration to determine the course of the reaction.

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Definitions:

Glucose Transport

The process of moving glucose molecules across cell membranes, often involving specific transporter proteins, to supply cells with energy.

Concentration Gradient

The process of particles, which are sometimes called solutes, moving through a solution or gas from an area with a higher number of particles to an area with a lower number of particles.

Plasmolysis

A process in which cells lose water in a hypertonic solution, causing the cell membrane to detach from the cell wall, typically observed in plants.

Pinocytosis

Cell drinking; a type of endocytosis by which cells engulf and absorb droplets of liquids. Compare with phagocytosis and receptor-mediated endocytosis.